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<div class="title">stripedio.hpp</div>  </div>
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<a href="stripedio_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#ifndef DEF_STRIPEDIO_HPP</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define DEF_STRIPEDIO_HPP</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &lt;iostream&gt;</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &lt;fcntl.h&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &lt;pthread.h&gt;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#include &lt;errno.h&gt;</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">//#include &lt;omp.h&gt;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="logger_8hpp.html">logger/logger.hpp</a>&quot;</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="metrics_8hpp.html">metrics/metrics.hpp</a>&quot;</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="preprocessor">#include &quot;util/synchronized_queue.hpp&quot;</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="ioutil_8hpp.html">util/ioutil.hpp</a>&quot;</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="cmdopts_8hpp.html">util/cmdopts.hpp</a>&quot;</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="keyword">namespace </span>graphchi {</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    </div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">size_t</span> get_filesize(std::string filename);</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keyword">struct </span>pinned_file;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    </div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="structgraphchi_1_1io__descriptor.html">   62</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1io__descriptor.html">io_descriptor</a> {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        std::string filename;    </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        std::vector&lt;int&gt; readdescs;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        std::vector&lt;int&gt; writedescs;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        <a class="code" href="structgraphchi_1_1pinned__file.html">pinned_file</a> * pinned_to_memory;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;        <span class="keywordtype">int</span> start_mplex;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        <span class="keywordtype">bool</span> open;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    };</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    </div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    </div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keyword">enum</span> BLOCK_ACTION { READ, WRITE };</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="comment">// Very simple ref count system</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"><a class="code" href="structgraphchi_1_1refcountptr.html">   75</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1refcountptr.html">refcountptr</a> {</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        <span class="keywordtype">char</span> * ptr;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        <span class="keyword">volatile</span> <span class="keywordtype">int</span> count;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        <a class="code" href="structgraphchi_1_1refcountptr.html">refcountptr</a>(<span class="keywordtype">char</span> * ptr, <span class="keywordtype">int</span> count) : ptr(ptr), count(count) {}</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    };</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="comment">// Forward declaration</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a>;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    </div>
<div class="line"><a name="l00084"></a><span class="lineno"><a class="code" href="structgraphchi_1_1iotask.html">   84</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1iotask.html">iotask</a> {</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;        BLOCK_ACTION action;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;        <span class="keywordtype">int</span> fd;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        </div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <a class="code" href="structgraphchi_1_1refcountptr.html">refcountptr</a> * ptr;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        <span class="keywordtype">size_t</span> length;</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        <span class="keywordtype">size_t</span> offset;</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        <span class="keywordtype">size_t</span> ptroffset;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        <span class="keywordtype">bool</span> free_after;</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        <a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        </div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        </div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        <a class="code" href="structgraphchi_1_1iotask.html">iotask</a>() : action(READ), fd(0), ptr(NULL), length(0), offset(0), ptroffset(0), free_after(<span class="keyword">false</span>), iomgr(NULL) {}</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        <a class="code" href="structgraphchi_1_1iotask.html">iotask</a>(<a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr, BLOCK_ACTION act, <span class="keywordtype">int</span> fd,  <a class="code" href="structgraphchi_1_1refcountptr.html">refcountptr</a> * ptr, <span class="keywordtype">size_t</span> length, <span class="keywordtype">size_t</span> offset, <span class="keywordtype">size_t</span> ptroffset, <span class="keywordtype">bool</span> free_after=<span class="keyword">false</span>) : </div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        action(act), fd(fd), ptr(ptr),length(length), offset(offset), ptroffset(ptroffset), free_after(free_after), iomgr(iomgr) {}</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    };</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    </div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="code" href="structgraphchi_1_1thrinfo.html">  101</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1thrinfo.html">thrinfo</a> {</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <a class="code" href="classgraphchi_1_1synchronized__queue.html">synchronized_queue&lt;iotask&gt;</a> * readqueue;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        <a class="code" href="classgraphchi_1_1synchronized__queue.html">synchronized_queue&lt;iotask&gt;</a> * commitqueue;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        <a class="code" href="classgraphchi_1_1synchronized__queue.html">synchronized_queue&lt;iotask&gt;</a> * prioqueue;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        </div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        <span class="keywordtype">bool</span> running;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        <a class="code" href="classgraphchi_1_1metrics.html">metrics</a> * m;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        <span class="keyword">volatile</span> <span class="keywordtype">int</span> pending_writes;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        <span class="keyword">volatile</span> <span class="keywordtype">int</span> pending_reads;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        <span class="keywordtype">int</span> mplex;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    };</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    </div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    <span class="comment">// Forward declaration</span></div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> * io_thread_loop(<span class="keywordtype">void</span> * _info);</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    </div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="code" href="structgraphchi_1_1stripe__chunk.html">  116</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1stripe__chunk.html">stripe_chunk</a> {</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        <span class="keywordtype">int</span> mplex_thread;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;        <span class="keywordtype">size_t</span> offset;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        <span class="keywordtype">size_t</span> len;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;        <a class="code" href="structgraphchi_1_1stripe__chunk.html">stripe_chunk</a>(<span class="keywordtype">int</span> mplex_thread, <span class="keywordtype">size_t</span> offset, <span class="keywordtype">size_t</span> len) : mplex_thread(mplex_thread), offset(offset), len(len) {}</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    };</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    </div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    </div>
<div class="line"><a name="l00124"></a><span class="lineno"><a class="code" href="structgraphchi_1_1streaming__task.html">  124</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1streaming__task.html">streaming_task</a> {</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;        <a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr;</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        <span class="keywordtype">int</span> <a class="code" href="structsession.html">session</a>;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        <span class="keywordtype">size_t</span> len;</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;        <span class="keyword">volatile</span> <span class="keywordtype">size_t</span> curpos;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;        <span class="keywordtype">char</span> ** buf;</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;        <a class="code" href="structgraphchi_1_1streaming__task.html">streaming_task</a>() {}</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;        <a class="code" href="structgraphchi_1_1streaming__task.html">streaming_task</a>(<a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr, <span class="keywordtype">int</span> <a class="code" href="structsession.html">session</a>, <span class="keywordtype">size_t</span> len, <span class="keywordtype">char</span> ** buf) : iomgr(iomgr), session(session), len(len), curpos(0), buf(buf) {}</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    };</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    </div>
<div class="line"><a name="l00134"></a><span class="lineno"><a class="code" href="structgraphchi_1_1pinned__file.html">  134</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1pinned__file.html">pinned_file</a> {</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;        std::string filename;</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;        <span class="keywordtype">size_t</span> length;</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;        uint8_t * data;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        <span class="keywordtype">bool</span> touched;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    };</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    </div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    <span class="comment">// Forward declaration</span></div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> * stream_read_loop(<span class="keywordtype">void</span> * _info);    </div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    </div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    </div>
<div class="line"><a name="l00145"></a><span class="lineno"><a class="code" href="classgraphchi_1_1stripedio.html">  145</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> {</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;        </div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        std::vector&lt;io_descriptor *&gt; sessions;</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;        <a class="code" href="classgraphchi_1_1mutex.html">mutex</a> mlock;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;        <span class="keywordtype">int</span> blocksize;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        <span class="keywordtype">int</span> stripesize;</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        <span class="keywordtype">int</span> multiplex;</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;        std::string multiplex_root;</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;        <span class="keywordtype">bool</span> disable_preloading;</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        </div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;        std::vector&lt; synchronized_queue&lt;iotask&gt; &gt; mplex_readtasks;</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;        std::vector&lt; synchronized_queue&lt;iotask&gt; &gt; mplex_writetasks;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;        std::vector&lt; synchronized_queue&lt;iotask&gt; &gt; mplex_priotasks;</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        std::vector&lt; pthread_t &gt; threads;</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        std::vector&lt; thrinfo * &gt; thread_infos;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;        <a class="code" href="classgraphchi_1_1metrics.html">metrics</a> &amp;m;</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;        </div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        <span class="comment">/* Memory-pinned files */</span></div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;        std::vector&lt;pinned_file *&gt; preloaded_files;</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        <a class="code" href="classgraphchi_1_1mutex.html">mutex</a> preload_lock;</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        <span class="keywordtype">size_t</span> preloaded_bytes;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;        <span class="keywordtype">size_t</span> max_preload_bytes;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;        </div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;        </div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;        <span class="keywordtype">int</span> niothreads; <span class="comment">// threads per mplex</span></div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;        </div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        <a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a>( <a class="code" href="classgraphchi_1_1metrics.html">metrics</a> &amp;_m) : m(_m) {</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;            disable_preloading = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;            blocksize = get_option_int(<span class="stringliteral">&quot;io.blocksize&quot;</span>, 1024 * 1024);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;            stripesize = get_option_int(<span class="stringliteral">&quot;io.stripesize&quot;</span>, blocksize/2);</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;            preloaded_bytes = 0;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;            max_preload_bytes = 1024 * 1024 * get_option_long(<span class="stringliteral">&quot;preload.max_megabytes&quot;</span>, 0);</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;            </div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;            <span class="keywordflow">if</span> (max_preload_bytes &gt; 0) {</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Preloading maximum &quot;</span> &lt;&lt; max_preload_bytes &lt;&lt; <span class="stringliteral">&quot; bytes.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;            }</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;            </div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;            multiplex = get_option_int(<span class="stringliteral">&quot;multiplex&quot;</span>, 1);</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;            <span class="keywordflow">if</span> (multiplex&gt;1) {</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;                multiplex_root = get_option_string(<span class="stringliteral">&quot;multiplex_root&quot;</span>, <span class="stringliteral">&quot;&lt;not-set&gt;&quot;</span>);</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;                multiplex_root = <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;                stripesize = 1024*1024*1024;</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;            }</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;            m.set(<span class="stringliteral">&quot;stripesize&quot;</span>, (<span class="keywordtype">size_t</span>)stripesize);</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;            </div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;            <span class="comment">// Start threads (niothreads is now threads per multiplex)</span></div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;            niothreads = get_option_int(<span class="stringliteral">&quot;niothreads&quot;</span>, 1);</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;            m.set(<span class="stringliteral">&quot;niothreads&quot;</span>, (<span class="keywordtype">size_t</span>)niothreads);</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;            </div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;            <span class="comment">// Each multiplex partition has its own queues</span></div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;multiplex * niothreads; i++) {</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;                mplex_readtasks.push_back(<a class="code" href="classgraphchi_1_1synchronized__queue.html">synchronized_queue&lt;iotask&gt;</a>());</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;                mplex_writetasks.push_back(<a class="code" href="classgraphchi_1_1synchronized__queue.html">synchronized_queue&lt;iotask&gt;</a>());</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;                mplex_priotasks.push_back(<a class="code" href="classgraphchi_1_1synchronized__queue.html">synchronized_queue&lt;iotask&gt;</a>());</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;            }</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;            </div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;            <span class="keywordtype">int</span> k = 0;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; multiplex; i++) {</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;                <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j=0; j &lt; niothreads; j++) {</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;                    <a class="code" href="structgraphchi_1_1thrinfo.html">thrinfo</a> * cthreadinfo = <span class="keyword">new</span> <a class="code" href="structgraphchi_1_1thrinfo.html">thrinfo</a>();</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;                    cthreadinfo-&gt;commitqueue = &amp;mplex_writetasks[k];</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;                    cthreadinfo-&gt;readqueue = &amp;mplex_readtasks[k];</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;                    cthreadinfo-&gt;prioqueue = &amp;mplex_priotasks[k];</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;                    cthreadinfo-&gt;running = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;                    cthreadinfo-&gt;pending_writes = 0;</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;                    cthreadinfo-&gt;pending_reads = 0;</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;                    cthreadinfo-&gt;mplex = i;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;                    cthreadinfo-&gt;m = &amp;m;</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;                    thread_infos.push_back(cthreadinfo);</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;                    </div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;                    pthread_t iothread;</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;                    <span class="keywordtype">int</span> ret = pthread_create(&amp;iothread, NULL, io_thread_loop, cthreadinfo);</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;                    threads.push_back(iothread);</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;                    assert(ret&gt;=0);</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;                    k++;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;                }</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;            }</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        }</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;        </div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        ~<a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a>() {</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;            <span class="keywordtype">int</span> mplex = (int) thread_infos.size();</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;            <span class="comment">// Quit all threads</span></div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;mplex; i++) {</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;                thread_infos[i]-&gt;running=<span class="keyword">false</span>;</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;            }</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;            <span class="keywordtype">size_t</span> nthreads = threads.size();</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i&lt;nthreads; i++) {</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;                pthread_join(threads[i], NULL);</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;            }</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;mplex; i++) {</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;                <span class="keyword">delete</span> thread_infos[i];</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;            }</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;            </div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j=0; j&lt;(int)sessions.size(); j++) {</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;                <span class="keywordflow">if</span> (sessions[j] != NULL) {</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;                    <span class="keyword">delete</span> sessions[j];</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;                    sessions[j] = NULL;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;                }</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;            }</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;            </div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;            <span class="keywordflow">for</span>(std::vector&lt;pinned_file *&gt;::iterator it=preloaded_files.begin(); </div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;                it != preloaded_files.end(); ++it) {</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;                <a class="code" href="structgraphchi_1_1pinned__file.html">pinned_file</a> * preloaded = (*it);</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;                <span class="keyword">delete</span> preloaded-&gt;data;</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;                <span class="keyword">delete</span> preloaded;</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;            }</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;        }</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;        </div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;        <span class="keywordtype">void</span> set_disable_preloading(<span class="keywordtype">bool</span> b) {</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;            disable_preloading = b;</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;            <span class="keywordflow">if</span> (b) logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Disabled preloading.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;        }</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;        </div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;        <span class="keywordtype">bool</span> multiplexed() {</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;            <span class="keywordflow">return</span> multiplex&gt;1;</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        }</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;        </div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;        <span class="keywordtype">void</span> print_session(<span class="keywordtype">int</span> <a class="code" href="structsession.html">session</a>) {</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;multiplex; i++) {</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;multiplex: &quot;</span> &lt;&lt; multiplex &lt;&lt; std::endl;</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;Read desc: &quot;</span> &lt;&lt; sessions[session]-&gt;readdescs[i] &lt;&lt; std::endl;</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;            }</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;            </div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;(int)sessions[session]-&gt;writedescs.size(); i++) {</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;multiplex: &quot;</span> &lt;&lt; multiplex &lt;&lt; std::endl;</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;Read desc: &quot;</span> &lt;&lt; sessions[session]-&gt;writedescs[i] &lt;&lt; std::endl;</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;            }</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;        }</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;        </div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;        <span class="comment">// Compute a hash for filename which is used for</span></div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;        <span class="comment">// permuting the stripes. It is important the permutation</span></div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;        <span class="comment">// is same regardless of when the file is opened.</span></div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;        <span class="keywordtype">int</span> hash(std::string filename) {</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">char</span> * cstr = filename.c_str();</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;            <span class="keywordtype">int</span> hash = 1;</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;            <span class="keywordtype">int</span> l = (int) strlen(cstr);</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;l; i++) {</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;                hash = 31*hash + cstr[i];</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;            }</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;            <span class="keywordflow">return</span> std::abs(hash);</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;        }</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;        </div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;        <span class="keywordtype">int</span> open_session(std::string filename, <span class="keywordtype">bool</span> readonly=<span class="keyword">false</span>) {</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;            mlock.lock();</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;            <span class="comment">// FIXME: known memory leak: sessions table is never shrunk</span></div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;            <span class="keywordtype">int</span> session_id = (int) sessions.size();</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;            <a class="code" href="structgraphchi_1_1io__descriptor.html">io_descriptor</a> * iodesc = <span class="keyword">new</span> <a class="code" href="structgraphchi_1_1io__descriptor.html">io_descriptor</a>();</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;            iodesc-&gt;open = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;            iodesc-&gt;pinned_to_memory = is_preloaded(filename);</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;            iodesc-&gt;start_mplex = hash(filename) % multiplex;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;            sessions.push_back(iodesc);</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;            mlock.unlock();</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;            </div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;            <span class="keywordflow">if</span> (NULL != iodesc-&gt;pinned_to_memory) {</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Opened preloaded session: &quot;</span> &lt;&lt; filename &lt;&lt; std::endl;</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;                <span class="keywordflow">return</span> session_id;</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;            }</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;            </div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;multiplex; i++) {</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;                std::string fname = multiplexprefix(i) + filename;</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;                <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j=0; j&lt;niothreads+(multiplex == 1 ? 1 : 0); j++) { <span class="comment">// Hack to have one fd for synchronous</span></div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;                    <span class="keywordtype">int</span> rddesc = open(fname.c_str(), O_RDONLY);</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;                    <span class="keywordflow">if</span> (rddesc &lt; 0) logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>)  &lt;&lt; <span class="stringliteral">&quot;Could not open: &quot;</span> &lt;&lt; fname &lt;&lt; <span class="stringliteral">&quot; session: &quot;</span> &lt;&lt; session_id </div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;                        &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;                    assert(rddesc&gt;=0);</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;                    iodesc-&gt;readdescs.push_back(rddesc);</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="preprocessor">#ifdef F_NOCACHE</span></div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;<span class="preprocessor"></span>                    <span class="keywordflow">if</span> (!readonly) </div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;                        fcntl(rddesc, F_NOCACHE, 1);</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;<span class="preprocessor"></span>                    <span class="keywordflow">if</span> (!readonly) {</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;                        <span class="keywordtype">int</span> wrdesc = open(fname.c_str(), O_RDWR);</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;                        <span class="keywordflow">if</span> (wrdesc &lt; 0) logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>)  &lt;&lt; <span class="stringliteral">&quot;Could not open for writing: &quot;</span> &lt;&lt; fname &lt;&lt; <span class="stringliteral">&quot; session: &quot;</span> &lt;&lt; session_id</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;                            &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;                        assert(wrdesc&gt;=0);</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;<span class="preprocessor">#ifdef F_NOCACHE</span></div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;<span class="preprocessor"></span>                        fcntl(wrdesc, F_NOCACHE, 1);</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;                        </div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;<span class="preprocessor"></span>                        iodesc-&gt;writedescs.push_back(wrdesc);</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;                    }</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;                }</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;            }</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;            iodesc-&gt;filename = filename;</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;            <span class="keywordflow">if</span> (iodesc-&gt;writedescs.size() &gt; 0)  {</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Opened write-session: &quot;</span> &lt;&lt; session_id &lt;&lt; <span class="stringliteral">&quot;(&quot;</span> &lt;&lt; iodesc-&gt;writedescs[0] &lt;&lt; <span class="stringliteral">&quot;) for &quot;</span> &lt;&lt; filename &lt;&lt; std::endl;</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Opened read-session: &quot;</span> &lt;&lt; session_id &lt;&lt; <span class="stringliteral">&quot;(&quot;</span> &lt;&lt; iodesc-&gt;readdescs[0] &lt;&lt; <span class="stringliteral">&quot;) for &quot;</span> &lt;&lt; filename &lt;&lt; std::endl;</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;            }</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;            <span class="keywordflow">return</span> session_id;</div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;        }</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;        </div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;        <span class="keywordtype">void</span> close_session(<span class="keywordtype">int</span> session) {</div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;            mlock.lock();</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;            <span class="comment">// Note: currently io-descriptors are left into the vertex array</span></div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;            <span class="comment">// in purpose to make managed memory work. Should be fixed as this is </span></div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;            <span class="comment">// a (relatively minor) memory leak.</span></div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;            <span class="keywordtype">bool</span> wasopen;</div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;            <a class="code" href="structgraphchi_1_1io__descriptor.html">io_descriptor</a> * iodesc = sessions[session];</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;            wasopen = iodesc-&gt;open;</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;            iodesc-&gt;open = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;            mlock.unlock();</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;            <span class="keywordflow">if</span> (wasopen) {</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;                <span class="keywordflow">for</span>(std::vector&lt;int&gt;::iterator it=iodesc-&gt;readdescs.begin(); it!=iodesc-&gt;readdescs.end(); ++it) {</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;                    close(*it);</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;                }</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;                <span class="keywordflow">for</span>(std::vector&lt;int&gt;::iterator it=iodesc-&gt;writedescs.begin(); it!=iodesc-&gt;writedescs.end(); ++it) {</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;                    close(*it);</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;                }</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;            }</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;        }</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;        </div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;        <span class="keywordtype">int</span> mplex_for_offset(<span class="keywordtype">int</span> session, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;            <span class="keywordflow">return</span> ((<span class="keywordtype">int</span>) (off / stripesize) + sessions[session]-&gt;start_mplex) % multiplex;</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;        }</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;        </div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;        <span class="comment">// Returns vector of &lt;mplex, offset&gt; </span></div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;        std::vector&lt; stripe_chunk &gt; stripe_offsets(<span class="keywordtype">int</span> session, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;            <span class="keywordtype">size_t</span> end = off+nbytes;</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;            <span class="keywordtype">size_t</span> idx = off;</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;            <span class="keywordtype">size_t</span> bufoff = 0;</div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;            std::vector&lt;stripe_chunk&gt; stripelist;</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;            <span class="keywordflow">while</span>(idx&lt;end) {</div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;                <span class="keywordtype">size_t</span> blockoff = idx%stripesize;</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;                <span class="keywordtype">size_t</span> blocklen = std::min(stripesize-blockoff, end-idx);</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;                </div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;                <span class="keywordtype">int</span> mplex_thread = (int) mplex_for_offset(session, idx) * niothreads + (int) (random() % niothreads);</div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;                stripelist.push_back(<a class="code" href="structgraphchi_1_1stripe__chunk.html">stripe_chunk</a>(mplex_thread, bufoff, blocklen));</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;                </div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;                bufoff += blocklen;</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;                idx += blocklen;</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;            }</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;            <span class="keywordflow">return</span> stripelist;</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;        }</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;        </div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;        <span class="keywordtype">void</span> preada_async(<span class="keywordtype">int</span> session,  T * tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;            std::vector&lt;stripe_chunk&gt; stripelist = stripe_offsets(session, nbytes, off);</div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;            <a class="code" href="structgraphchi_1_1refcountptr.html">refcountptr</a> * refptr = <span class="keyword">new</span> <a class="code" href="structgraphchi_1_1refcountptr.html">refcountptr</a>((<span class="keywordtype">char</span>*)tbuf, (<span class="keywordtype">int</span>)stripelist.size());</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;(int)stripelist.size(); i++) {</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;                <a class="code" href="structgraphchi_1_1stripe__chunk.html">stripe_chunk</a> chunk = stripelist[i];</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;                __sync_add_and_fetch(&amp;thread_infos[chunk.mplex_thread]-&gt;pending_reads, 1);</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;                mplex_readtasks[chunk.mplex_thread].push(<a class="code" href="structgraphchi_1_1iotask.html">iotask</a>(<span class="keyword">this</span>, READ, sessions[session]-&gt;readdescs[chunk.mplex_thread], </div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;                                                                refptr, chunk.len, chunk.offset+off, chunk.offset));</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;            }</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;        }</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;        </div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;        <span class="comment">/* Used for pipelined read */</span></div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;        <span class="keywordtype">void</span> launch_stream_reader(<a class="code" href="structgraphchi_1_1streaming__task.html">streaming_task</a>  * task) {</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;            pthread_t t;</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;            <span class="keywordtype">int</span> ret = pthread_create(&amp;t, NULL, stream_read_loop, (<span class="keywordtype">void</span>*)task);</div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;            assert(ret&gt;=0);</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;        }</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;        </div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;        </div>
<div class="line"><a name="l00408"></a><span class="lineno"><a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">  408</a></span>&#160;        <span class="keywordtype">bool</span> <a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(<span class="keywordtype">int</span> session) {</div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;            <span class="keywordflow">return</span> sessions[session]-&gt;pinned_to_memory;</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;        }</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;        </div>
<div class="line"><a name="l00417"></a><span class="lineno"><a class="code" href="classgraphchi_1_1stripedio.html#a07dcf36dade9f8820a7717cde1de498d">  417</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1stripedio.html#a07dcf36dade9f8820a7717cde1de498d">allow_preloading</a>(std::string filename) {</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;            <span class="keywordflow">if</span> (disable_preloading) {</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;                <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;            }</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;            preload_lock.lock();</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;            <span class="keywordtype">size_t</span> filesize = get_filesize(filename);</div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;            <span class="keywordflow">if</span> (preloaded_bytes + filesize &lt;= max_preload_bytes) {</div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;                preloaded_bytes += filesize;</div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;                m.set(<span class="stringliteral">&quot;preload_bytes&quot;</span>, preloaded_bytes);</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;                </div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;                <a class="code" href="structgraphchi_1_1pinned__file.html">pinned_file</a> * pfile = <span class="keyword">new</span> <a class="code" href="structgraphchi_1_1pinned__file.html">pinned_file</a>();</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;                pfile-&gt;filename = filename;</div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;                pfile-&gt;length = filesize;</div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;                pfile-&gt;data = (uint8_t*) malloc(filesize);</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;                pfile-&gt;touched = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;                assert(pfile-&gt;data != NULL);</div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;                </div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;                <span class="keywordtype">int</span> fid = open(filename.c_str(), O_RDONLY);</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;                <span class="keywordflow">if</span> (fid &lt; 0) {</div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not read file: &quot;</span> &lt;&lt; filename </div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;                    &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;                }</div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;                assert(fid &gt;= 0);</div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;                <span class="comment">/* Preload the file */</span></div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Preloading: &quot;</span> &lt;&lt; filename &lt;&lt; std::endl;</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;                preada(fid, pfile-&gt;data, filesize, 0);    </div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;                close(fid);</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;                preloaded_files.push_back(pfile);</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;            }</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;            preload_lock.unlock();</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;        }</div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;        </div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;        <span class="keywordtype">void</span> commit_preloaded() {</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;            <span class="keywordflow">for</span>(std::vector&lt;pinned_file *&gt;::iterator it=preloaded_files.begin(); </div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;                it != preloaded_files.end(); ++it) {</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;                <a class="code" href="structgraphchi_1_1pinned__file.html">pinned_file</a> * preloaded = (*it);</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;                <span class="keywordflow">if</span> (preloaded-&gt;touched) {</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Commit preloaded file: &quot;</span> &lt;&lt; preloaded-&gt;filename &lt;&lt; std::endl;</div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;                    <span class="keywordtype">int</span> fid = open(preloaded-&gt;filename.c_str(), O_WRONLY);</div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;                    <span class="keywordflow">if</span> (fid &lt; 0) {</div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;                        logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not read file: &quot;</span> &lt;&lt; preloaded-&gt;filename </div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;                            &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;                        <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;                    }</div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;                    pwritea(fid, preloaded-&gt;data, preloaded-&gt;length, 0);</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;                    close(fid);</div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;                }</div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;                preloaded-&gt;touched = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;            }</div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;        }</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;        </div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;        pinned_file * is_preloaded(std::string filename) {</div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;            preload_lock.lock();</div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;            pinned_file * preloaded = NULL;</div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;            <span class="keywordflow">for</span>(std::vector&lt;pinned_file *&gt;::iterator it=preloaded_files.begin(); </div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;                it != preloaded_files.end(); ++it) {</div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;                <span class="keywordflow">if</span> (filename == (*it)-&gt;filename) {</div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;                    preloaded = *it;</div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;                }</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;            }</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;            preload_lock.unlock();</div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;            <span class="keywordflow">return</span> preloaded;</div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;        }</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;        </div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;        </div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;        <span class="comment">// Note: data is freed after write!</span></div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;        <span class="keywordtype">void</span> pwritea_async(<span class="keywordtype">int</span> session, T * tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off, <span class="keywordtype">bool</span> free_after) {</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;            std::vector&lt;stripe_chunk&gt; stripelist = stripe_offsets(session, nbytes, off);</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;            refcountptr * refptr = <span class="keyword">new</span> refcountptr((<span class="keywordtype">char</span>*)tbuf, (<span class="keywordtype">int</span>) stripelist.size());</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;(int)stripelist.size(); i++) {</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;                stripe_chunk chunk = stripelist[i];</div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;                __sync_add_and_fetch(&amp;thread_infos[chunk.mplex_thread]-&gt;pending_writes, 1);</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;                mplex_writetasks[chunk.mplex_thread].push(iotask(<span class="keyword">this</span>, WRITE, sessions[session]-&gt;writedescs[chunk.mplex_thread], </div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;                                                                 refptr, chunk.len, chunk.offset+off, chunk.offset, free_after));</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;            }</div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;        }</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;        </div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;        <span class="keywordtype">void</span> preada_now(<span class="keywordtype">int</span> session,  T * tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;            metrics_entry me = m.start_time();</div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;            </div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;            <span class="keywordflow">if</span> (multiplex &gt; 1) {</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;                std::vector&lt;stripe_chunk&gt; stripelist = stripe_offsets(session, nbytes, off);</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;                <span class="keywordtype">size_t</span> checklen=0;</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;                refcountptr * refptr = <span class="keyword">new</span> refcountptr((<span class="keywordtype">char</span>*)tbuf, (<span class="keywordtype">int</span>) stripelist.size());</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;                refptr-&gt;count++; <span class="comment">// Take a reference so we can spin on it</span></div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;                <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; (int)stripelist.size(); i++) {</div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;                    stripe_chunk chunk = stripelist[i];</div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;                    __sync_add_and_fetch(&amp;thread_infos[chunk.mplex_thread]-&gt;pending_reads, 1);</div>
<div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;                    </div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;                    <span class="comment">// Use prioritized task queue</span></div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;                    mplex_priotasks[chunk.mplex_thread].push(iotask(<span class="keyword">this</span>, READ, sessions[session]-&gt;readdescs[chunk.mplex_thread], </div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;                                                                    refptr, chunk.len, chunk.offset+off, chunk.offset));</div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;                    checklen += chunk.len;</div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;                }</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;                assert(checklen == nbytes);</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;                </div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;                <span class="comment">// Spin</span></div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;                <span class="keywordflow">while</span>(refptr-&gt;count&gt;1) {</div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;                    usleep(5000);</div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;                }</div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;                <span class="keyword">delete</span> refptr;</div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;                preada(sessions[session]-&gt;readdescs[threads.size()], tbuf, nbytes, off);</div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;            }</div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;            m.stop_time(me, <span class="stringliteral">&quot;preada_now&quot;</span>, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;        }</div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;        </div>
<div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;        <span class="keywordtype">void</span> pwritea_now(<span class="keywordtype">int</span> session, T * tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;            metrics_entry me = m.start_time();</div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;            std::vector&lt;stripe_chunk&gt; stripelist = stripe_offsets(session, nbytes, off);</div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;            <span class="keywordtype">size_t</span> checklen=0;</div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;            </div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;(int)stripelist.size(); i++) {</div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;                stripe_chunk chunk = stripelist[i];</div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;                pwritea(sessions[session]-&gt;writedescs[chunk.mplex_thread], (<span class="keywordtype">char</span>*)tbuf+chunk.offset, chunk.len, chunk.offset+off);</div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;                checklen += chunk.len;</div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;            }</div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;            assert(checklen == nbytes);</div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;            m.stop_time(me, <span class="stringliteral">&quot;pwritea_now&quot;</span>, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;            </div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;        }</div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;        </div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;        </div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;        </div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00550"></a><span class="lineno"><a class="code" href="classgraphchi_1_1stripedio.html#a8fa21b2d669bd4ae553dffe483932fa9">  550</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1stripedio.html#a8fa21b2d669bd4ae553dffe483932fa9">managed_pwritea_async</a>(<span class="keywordtype">int</span> session, T ** tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off, <span class="keywordtype">bool</span> free_after) {</div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;            <span class="keywordflow">if</span> (!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session)) {</div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;                pwritea_async(session, *tbuf, nbytes, off, free_after);</div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;                <span class="comment">// Do nothing but mark the descriptor as &#39;dirty&#39;</span></div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;                sessions[session]-&gt;pinned_to_memory-&gt;touched = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;            }</div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;        }</div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;        </div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;        <span class="keywordtype">void</span> managed_preada_now(<span class="keywordtype">int</span> session,  T ** tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;            <span class="keywordflow">if</span> (!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session)) {</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;                preada_now(session, *tbuf, nbytes,  off);</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;                io_descriptor * iodesc = sessions[session];</div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;                *tbuf = (T*) (iodesc-&gt;pinned_to_memory-&gt;data + off);</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;            }</div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;        }</div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;        </div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;        <span class="keywordtype">void</span> managed_pwritea_now(<span class="keywordtype">int</span> session, T ** tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;            <span class="keywordflow">if</span> (!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session)) {</div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;                pwritea_now(session, *tbuf, nbytes, off);</div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;                <span class="comment">// Do nothing but mark the descriptor as &#39;dirty&#39;</span></div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;                sessions[session]-&gt;pinned_to_memory-&gt;touched = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;            }</div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;        }</div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;        </div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;        <span class="keywordtype">void</span> managed_malloc(<span class="keywordtype">int</span> session, T ** tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> noff) {</div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;            <span class="keywordflow">if</span> (!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session)) {</div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;                *tbuf = (T*) malloc(nbytes);</div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;                io_descriptor * iodesc = sessions[session];</div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;                *tbuf = (T*) (iodesc-&gt;pinned_to_memory-&gt;data + noff);</div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;            }</div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;        }</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;        </div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;        <span class="keywordtype">void</span> managed_preada_async(<span class="keywordtype">int</span> session, T ** tbuf, <span class="keywordtype">size_t</span> nbytes, <span class="keywordtype">size_t</span> off) {</div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;            <span class="keywordflow">if</span> (!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session)) {</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;                preada_async(session, *tbuf, nbytes,  off);</div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;                io_descriptor * iodesc = sessions[session];</div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;                *tbuf = (T*) (iodesc-&gt;pinned_to_memory-&gt;data + off);</div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;            }</div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;        }</div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;        </div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;        <span class="keywordtype">void</span> managed_release(<span class="keywordtype">int</span> session, T ** ptr) {</div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;            <span class="keywordflow">if</span> (!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session)) {</div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;                assert(*ptr != NULL);</div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;                free(*ptr);</div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;            }</div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;            *ptr = NULL;</div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;        }</div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;        </div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;        </div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;        <span class="keywordtype">void</span> truncate(<span class="keywordtype">int</span> session, <span class="keywordtype">size_t</span> nbytes) {</div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;            assert(!<a class="code" href="classgraphchi_1_1stripedio.html#ab84bcc570151709fba172c3159125d54">pinned_session</a>(session));</div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;            assert(multiplex &lt;= 1);  <span class="comment">// We do not support truncating on multiplex yet</span></div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;            <span class="keywordtype">int</span> stat = ftruncate(sessions[session]-&gt;writedescs[0], nbytes); </div>
<div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;            <span class="keywordflow">if</span> (stat != 0) {</div>
<div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not truncate &quot;</span> &lt;&lt; sessions[session]-&gt;filename &lt;&lt;</div>
<div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;                <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;                assert(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;            }</div>
<div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;        }</div>
<div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;        </div>
<div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;        <span class="keywordtype">void</span> wait_for_reads() {</div>
<div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;            metrics_entry me = m.start_time();</div>
<div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;            <span class="keywordtype">int</span> loops = 0;</div>
<div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;            <span class="keywordtype">int</span> mplex = (int) thread_infos.size();</div>
<div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;mplex; i++) {</div>
<div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;                <span class="keywordflow">while</span>(thread_infos[i]-&gt;pending_reads &gt; 0) {</div>
<div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;                    usleep(10000);</div>
<div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;                    loops++;</div>
<div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;                }</div>
<div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;            }</div>
<div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;            m.stop_time(me, <span class="stringliteral">&quot;stripedio_wait_for_reads&quot;</span>, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;        }</div>
<div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;        </div>
<div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;        <span class="keywordtype">void</span> wait_for_writes() {</div>
<div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;            metrics_entry me = m.start_time();</div>
<div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;            <span class="keywordtype">int</span> mplex = (int) thread_infos.size();</div>
<div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;mplex; i++) {</div>
<div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;                <span class="keywordflow">while</span>(thread_infos[i]-&gt;pending_writes&gt;0) {</div>
<div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;                    usleep(10000);</div>
<div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;                }</div>
<div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;            }</div>
<div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;            m.stop_time(me, <span class="stringliteral">&quot;stripedio_wait_for_writes&quot;</span>, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;        }</div>
<div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;        </div>
<div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;        </div>
<div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;        std::string multiplexprefix(<span class="keywordtype">int</span> stripe) {</div>
<div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;            <span class="keywordflow">if</span> (multiplex &gt; 1) {</div>
<div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;                <span class="keywordtype">char</span> mstr[255];</div>
<div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;                sprintf(mstr, <span class="stringliteral">&quot;%d/&quot;</span>, 1+stripe%multiplex);</div>
<div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;                <span class="keywordflow">return</span> multiplex_root + std::string(mstr);</div>
<div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;            } <span class="keywordflow">else</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;        }</div>
<div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;        </div>
<div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;        std::string multiplexprefix_random() {</div>
<div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;            <span class="keywordflow">return</span> multiplexprefix((<span class="keywordtype">int</span>)random() % multiplex);</div>
<div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;        }</div>
<div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;    };</div>
<div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;    </div>
<div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;    </div>
<div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> * io_thread_loop(<span class="keywordtype">void</span> * _info) {</div>
<div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;        iotask task;</div>
<div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;        thrinfo * info = (thrinfo*)_info;</div>
<div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;        logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Thread for multiplex :&quot;</span> &lt;&lt; info-&gt;mplex &lt;&lt; <span class="stringliteral">&quot; starting.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;        <span class="keywordflow">while</span>(info-&gt;running) {</div>
<div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;            <span class="keywordtype">bool</span> success;</div>
<div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;            <span class="keywordflow">if</span> (info-&gt;pending_reads&gt;0) {  <span class="comment">// Prioritize read queue</span></div>
<div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;                success = info-&gt;prioqueue-&gt;safepop(&amp;task);</div>
<div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;                <span class="keywordflow">if</span> (!success) {</div>
<div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;                    success = info-&gt;readqueue-&gt;safepop(&amp;task);</div>
<div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;                }</div>
<div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;                success = info-&gt;commitqueue-&gt;safepop(&amp;task);</div>
<div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;            }</div>
<div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;            <span class="keywordflow">if</span> (success) {</div>
<div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;                <span class="keywordflow">if</span> (task.action == WRITE) {  <span class="comment">// Write</span></div>
<div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;                    metrics_entry me = info-&gt;m-&gt;start_time();</div>
<div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;                    </div>
<div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;                    pwritea(task.fd, task.ptr-&gt;ptr + task.ptroffset, task.length, task.offset);  </div>
<div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;                    <span class="keywordflow">if</span> (task.free_after) {</div>
<div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;                        <span class="comment">// Threead-safe method of memory managment - ugly!</span></div>
<div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;                        <span class="keywordflow">if</span> (__sync_sub_and_fetch(&amp;task.ptr-&gt;count, 1) == 0) {</div>
<div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;                            free(task.ptr-&gt;ptr);</div>
<div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160;                            free(task.ptr);</div>
<div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;                        }</div>
<div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;                    }</div>
<div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;                    __sync_sub_and_fetch(&amp;info-&gt;pending_writes, 1);</div>
<div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;                    info-&gt;m-&gt;stop_time(me, <span class="stringliteral">&quot;commit_thr&quot;</span>);</div>
<div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;                    preada(task.fd, task.ptr-&gt;ptr+task.ptroffset, task.length, task.offset); </div>
<div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;                    __sync_sub_and_fetch(&amp;info-&gt;pending_reads, 1);</div>
<div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;                    <span class="keywordflow">if</span> (__sync_sub_and_fetch(&amp;task.ptr-&gt;count, 1) == 0) {</div>
<div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;                        free(task.ptr);</div>
<div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;                    }</div>
<div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;                }</div>
<div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;                usleep(50000); <span class="comment">// 50 ms</span></div>
<div class="line"><a name="l00696"></a><span class="lineno">  696</span>&#160;            }</div>
<div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;        }</div>
<div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;        <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;    }</div>
<div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;    </div>
<div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;    </div>
<div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> * stream_read_loop(<span class="keywordtype">void</span> * _info) {</div>
<div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;        streaming_task * task = (streaming_task*)_info;</div>
<div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;        timeval start, end;</div>
<div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;        gettimeofday(&amp;start, NULL);</div>
<div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;        <span class="keywordtype">size_t</span> bufsize = 32*1024*1024; <span class="comment">// 32 megs</span></div>
<div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160;        <span class="keywordtype">char</span> * tbuf;</div>
<div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;        </div>
<div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;        <span class="keywordflow">if</span> (task-&gt;iomgr-&gt;pinned_session(task-&gt;session)) {</div>
<div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;            __sync_add_and_fetch(&amp;task-&gt;curpos, task-&gt;len);</div>
<div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;            <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;        }</div>
<div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;        tbuf = *task-&gt;buf;</div>
<div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;        <span class="keywordflow">while</span>(task-&gt;curpos &lt; task-&gt;len) {</div>
<div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;            <span class="keywordtype">size_t</span> toread = std::min((<span class="keywordtype">size_t</span>)task-&gt;len - (<span class="keywordtype">size_t</span>)task-&gt;curpos, (<span class="keywordtype">size_t</span>)bufsize);</div>
<div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;            task-&gt;iomgr-&gt;preada_now(task-&gt;session, tbuf + task-&gt;curpos, toread, task-&gt;curpos);</div>
<div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;            __sync_add_and_fetch(&amp;task-&gt;curpos, toread);</div>
<div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;        }</div>
<div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;        </div>
<div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;        gettimeofday(&amp;end, NULL);</div>
<div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;        </div>
<div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;        <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;    }</div>
<div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160;    </div>
<div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;    </div>
<div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">size_t</span> get_filesize(std::string filename) {</div>
<div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;        std::string fname = filename;</div>
<div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160;        <span class="keywordtype">int</span> f = open(fname.c_str(), O_RDONLY);</div>
<div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;        </div>
<div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;        <span class="keywordflow">if</span> (f &lt; 0) {</div>
<div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not open file &quot;</span> &lt;&lt; filename &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;            assert(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00738"></a><span class="lineno">  738</span>&#160;        }</div>
<div class="line"><a name="l00739"></a><span class="lineno">  739</span>&#160;        </div>
<div class="line"><a name="l00740"></a><span class="lineno">  740</span>&#160;        off_t sz = lseek(f, 0, SEEK_END);</div>
<div class="line"><a name="l00741"></a><span class="lineno">  741</span>&#160;        close(f);</div>
<div class="line"><a name="l00742"></a><span class="lineno">  742</span>&#160;        <span class="keywordflow">return</span> sz;</div>
<div class="line"><a name="l00743"></a><span class="lineno">  743</span>&#160;    }</div>
<div class="line"><a name="l00744"></a><span class="lineno">  744</span>&#160;    </div>
<div class="line"><a name="l00745"></a><span class="lineno">  745</span>&#160;    </div>
<div class="line"><a name="l00746"></a><span class="lineno">  746</span>&#160;    </div>
<div class="line"><a name="l00747"></a><span class="lineno">  747</span>&#160;}</div>
<div class="line"><a name="l00748"></a><span class="lineno">  748</span>&#160;</div>
<div class="line"><a name="l00749"></a><span class="lineno">  749</span>&#160;</div>
<div class="line"><a name="l00750"></a><span class="lineno">  750</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00751"></a><span class="lineno">  751</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00752"></a><span class="lineno">  752</span>&#160;</div>
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</a> 1.8.1.1
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